Field tests and measurements (in-situ)

Because our field tests form an extensive group of analyses and measurements used in a wide range of technical branches, we have prepared a list according to their frequency of use. Engineering-geological surveying is predominantly based on the results of boring work amply supplemented by applied geophysics methods to their full extent.

Geo-radar measurements

Micro-gravity surveying

Seismic measurements

Geo-electric resistance measurements (MOS)

Resistance measurements DEMP

Measurements of filtration potentials (SP)

Ultrasonic materiology (UZ)

Thermometry

Vertical electric boring (VES)

Radio-detection

Supplemented with further tests

Dynamic penetration

Field volume meter

Extensometric measurements in boreholes

Inclinometric measurements in boreholes

Hydrogeologic water level measurements in boreholes or wells

According to survey location and other possible influences, the surveying can be supplemented with:

Pyrotechnic surveying

Measurements of gas concentrations

Corrosion surveying - measurements of stray current fields

The second significant group is geometric monitoring, which we divide into two activities, the monitoring of rock ambience and the monitoring of objects and structures. We use the following field measurements:

For monitoring rock ambience

Levelling measurements

Measurements of tension changes by the use of pressure bags

Measurements of deformations and permanency of form (convergence measurements) using band extensometers, rod distometers, laser rangefinders, and 3D optical geodetic methods

Measurements of water seepage into mining works

Extensometric measurements in boreholes

Inclinometric measurements in boreholes

Hydrogeologic water level measurements in boreholes or wells

Measurements of gas concentrations using complex of geophysical methods

Geo-radar measurements

Micro-gravity surveying

Geo-electric resistance measurements (MOS)

Resistance measurements DEMP

Measurements of filtration potentials (SP)

Thermometry

For monitoring objects influenced by nearby construction work

Documentation of building-technical conditions of buildings - passporting and re-passporting

Measurements of shifts in building cracks - deformometry

Measurements of changes in the inclination of buildings or their substructures - measurements of inclinations (surface inclinometry)

Measurements with Schmidt impact hammer using a wide range of geophysical methods

Integrity of piles (PIT and CHA)

Geo-radar measurements

Micro-gravity surveying

Geo-electric resistance measurements (MOS)

Resistance measurements DEMP

Measurements of filtration potentials (SP)

Ultrasonic materiology (UZ)

Thermometry

Complex logging measurements in boreholes

Radio-detection

Identification of reinforcement using a Profometer

The third group of activities is controlling redevelopment works. In these works the quality of redevelopment performed (grouting, etc) is evaluated using selected field measurements, possibly supplemented with laboratory tests. In particular, we use geophysical methods applied on structures and objects supported by selected measurements, especially:

Complex geophysical methods

and further:

Identification of reinforcement using a Profometer

Measurements with Schmidt impact hammer

Geodetic surveying of as-built construction

Measurements of deformations and permanency of form (convergence measurements) using band extensometers, rod distometers, laser rangefinders, and 3D optical geodetic methods

Control of compaction conducting static and impact soil load tests using a lightweight dynamic slab